Re: What year Yamaha?
If its that old, then its a European model. Yamaha didn't start selling in the states until 84. If its a Yamaha built for overseas market, there will be no manual or parts available for it in the states. 1984 was SN, 1985 was SK and 86 would have been SJ but there is no 4 hsp engine listed for the year 86. The smallest engine built in 86 was the 9.9 SJ for the US market.